public abstract class ParentNodeConstructor extends Instruction implements ValidatingInstruction, DivisibleInstruction
| Modifier and Type | Field and Description |
|---|---|
protected Expression |
content |
protected boolean |
preservingTypes
Flag set to true if validation=preserve and no schema type supplied for validation; also true
when validation="strip" if there is no need to physically strip type annotations
|
EFFECTIVE_BOOLEAN_VALUE, EVALUATE_METHOD, EVENT_FEED_METHOD, INHERITED_CONTEXT, INSPECTION_CONTEXT, ITEM_FEED_METHOD, ITERATE_METHOD, locationId, MAX_SEQUENCE_LENGTH, MAX_STRING_LENGTH, NAVIGATION_CONTEXT, NODE_VALUE_CONTEXT, PROCESS_METHOD, PUSH_SELECTION, staticProperties, UNBOUNDED_LOWER, UNBOUNDED_UPPER, W3C_CONSUMING, W3C_FREE_RANGING, W3C_GROUP_CONSUMING, W3C_MOTIONLESS, WATCH_METHOD| Constructor and Description |
|---|
ParentNodeConstructor()
Create a document or element node constructor instruction
|
| Modifier and Type | Method and Description |
|---|---|
PathMap.PathMapNodeSet |
addToPathMap(PathMap pathMap,
PathMap.PathMapNodeSet pathMapNodeSet)
Add a representation of this expression to a PathMap.
|
protected abstract void |
checkContentSequence(StaticContext env)
Check that the child instructions don't violate any obvious constraints for this kind of node
|
int |
computeCardinality()
Get the cardinality of the sequence returned by evaluating this instruction
|
boolean |
createsNewNodes()
Determine whether this instruction creates new nodes.
|
String |
getBaseURI()
Get the static base URI of the instruction
|
int |
getCardinality()
Determine the static cardinality of the expression.
|
Expression |
getContentExpression()
Get the expression that constructs the content of the element
|
SchemaType |
getSchemaType()
Get the schema type chosen for validation; null if not defined
|
int |
getValidationAction()
Get the validation mode for this instruction
|
ParseOptions |
getValidationOptions()
Get the validation options
|
boolean |
isLazyConstruction()
Establish whether lazy construction is to be used
|
boolean |
isPreservingTypes()
Determine whether this elementCreator performs validation or strips type annotations
|
Iterator<SubExpressionInfo> |
iterateSubExpressionInfo()
Get the immediate sub-expressions of this expression, with information about the relationship
of each expression to its parent expression.
|
Iterator<Expression> |
iterateSubExpressions()
Get the immediate sub-expressions of this expression.
|
Expression |
optimize(ExpressionVisitor visitor,
ExpressionVisitor.ContextItemType contextItemType)
Perform optimisation of an expression and its subexpressions.
|
protected void |
promoteInst(PromotionOffer offer)
Handle promotion offers, that is, non-local tree rewrites.
|
boolean |
replaceSubExpression(Expression original,
Expression replacement)
Replace one subexpression by a replacement subexpression
|
void |
setBaseURI(String uri)
Set the static base URI of the instruction
|
void |
setContentExpression(Expression content)
Set the expression that constructs the content of the element
|
void |
setLazyConstruction(boolean lazy)
Indicate that lazy construction should (or should not) be used.
|
void |
setNoNeedToStrip()
Set that the newly constructed node and everything underneath it will automatically be untyped,
without any need to physically remove type annotations, even though validation=STRIP is set.
|
void |
setValidationAction(int mode,
SchemaType schemaType)
Set the validation mode for the new document or element node
|
Expression |
simplify(ExpressionVisitor visitor)
Simplify an expression.
|
Expression |
typeCheck(ExpressionVisitor visitor,
ExpressionVisitor.ContextItemType contextItemType)
Perform type checking of an expression and its subexpressions.
|
assembleParams, assembleTunnelParams, computeSpecialProperties, dynamicError, evaluateAsString, evaluateItem, getConstructType, getExpressionName, getImplementationMethod, getInstructionName, getInstructionNameCode, getItemType, getIteratorFromProcessMethod, getSourceLocator, isXSLT, iterate, process, processLeavingTail, promoteadoptChildExpression, checkForUpdatingSubexpressions, checkPermittedContents, computeDependencies, computeStaticProperties, copy, doPromotion, dynamicError, effectiveBooleanValue, evaluatePendingUpdates, explain, explain, getColumnNumber, getColumnNumber, getContainer, getDependencies, getEvaluationMethod, getExecutable, getExpressionCompiler, getHostLanguage, getIntegerBounds, getIntrinsicDependencies, getLineNumber, getLineNumber, getLocationId, getLocationProvider, getObjectName, getProperties, getProperty, getPublicId, getSlotsUsed, getSpecialProperties, getStreamability, getStreamingAdjunct, getSystemId, getSystemId, hasVariableBinding, implementsStaticTypeCheck, isSubtreeExpression, isUpdatingExpression, isVacuousExpression, iterateEvents, markTailFunctionCalls, resetLocalStaticProperties, setContainer, setEvaluationMethod, setFiltered, setFlattened, setLocationId, staticTypeCheck, suppressValidation, toPattern, toStreamingPattern, toString, typeErrorclone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, waitgetColumnNumber, getLineNumber, getPublicId, getSystemIdprocessLeft, processRightprotected Expression content
protected boolean preservingTypes
public ParentNodeConstructor()
public void setBaseURI(String uri)
uri - the static base URIpublic String getBaseURI()
public void setLazyConstruction(boolean lazy)
lazy - set to true if lazy construction should be usedpublic final boolean isLazyConstruction()
public SchemaType getSchemaType()
getSchemaType in interface ValidatingInstructionpublic ParseOptions getValidationOptions()
public void setValidationAction(int mode,
SchemaType schemaType)
mode - the validation mode, for example Validation.STRICTschemaType - the required type (for validation by type). Null if not
validating by typepublic int getValidationAction()
getValidationAction in interface ValidatingInstructionValidation.STRICT or Validation.PRESERVEpublic void setNoNeedToStrip()
public void setContentExpression(Expression content)
content - the content expressionpublic Expression getContentExpression()
getContentExpression in interface DivisibleInstructionpublic int computeCardinality()
computeCardinality in class Instructionpublic Expression simplify(ExpressionVisitor visitor) throws XPathException
simplify in class Instructionvisitor - an expression visitorXPathException - if an error is discovered during expression rewritingpublic Expression typeCheck(ExpressionVisitor visitor, ExpressionVisitor.ContextItemType contextItemType) throws XPathException
ExpressionThis checks statically that the operands of the expression have the correct type; if necessary it generates code to do run-time type checking or type conversion. A static type error is reported only if execution cannot possibly succeed, that is, if a run-time type error is inevitable. The call may return a modified form of the expression.
This method is called after all references to functions and variables have been resolved to the declaration of the function or variable. However, the types of such functions and variables may not be accurately known if they have not been explicitly declared.
If the implementation returns a value other than "this", then it is required to ensure that the location information in the returned expression have been set up correctly. It should not rely on the caller to do this, although for historical reasons many callers do so.
typeCheck in class Expressionvisitor - an expression visitorcontextItemType - the static type of "." at the point where this expression is invoked.
The parameter is set to null if it is known statically that the context item will be undefined.
If the type of the context item is not known statically, the argument is set to
Type.ITEM_TYPEXPathException - if an error is discovered during this phase
(typically a type error)protected abstract void checkContentSequence(StaticContext env) throws XPathException
env - the static contextXPathException - if the check failspublic Expression optimize(ExpressionVisitor visitor, ExpressionVisitor.ContextItemType contextItemType) throws XPathException
ExpressionThis method is called after all references to functions and variables have been resolved to the declaration of the function or variable, and after all type checking has been done.
optimize in class Expressionvisitor - an expression visitorcontextItemType - the static type of "." at the point where this expression is invoked.
The parameter is set to null if it is known statically that the context item will be undefined.
If the type of the context item is not known statically, the argument is set to
Type.ITEM_TYPEXPathException - if an error is discovered during this phase
(typically a type error)protected void promoteInst(PromotionOffer offer) throws XPathException
promoteInst in class Instructionoffer - The type of rewrite being offeredXPathExceptionpublic Iterator<Expression> iterateSubExpressions()
iterateSubExpressions in class Expressionpublic Iterator<SubExpressionInfo> iterateSubExpressionInfo()
iterateSubExpressionInfo in class Expressionpublic boolean replaceSubExpression(Expression original, Expression replacement)
replaceSubExpression in class Expressionoriginal - the original subexpressionreplacement - the replacement subexpressionpublic final boolean createsNewNodes()
createsNewNodes in class Instructionpublic int getCardinality()
ExpressiongetCardinality in class Expressionpublic PathMap.PathMapNodeSet addToPathMap(PathMap pathMap, PathMap.PathMapNodeSet pathMapNodeSet)
The default implementation of this method assumes that an expression does no navigation other than the navigation done by evaluating its subexpressions, and that the subexpressions are evaluated in the same context as the containing expression. The method must be overridden for any expression where these assumptions do not hold. For example, implementations exist for AxisExpression, ParentExpression, and RootExpression (because they perform navigation), and for the doc(), document(), and collection() functions because they create a new navigation root. Implementations also exist for PathExpression and FilterExpression because they have subexpressions that are evaluated in a different context from the calling expression.
addToPathMap in class ExpressionpathMap - the PathMap to which the expression should be addedpathMapNodeSet - the PathMapNodeSet to which the paths embodied in this expression should be addedpublic boolean isPreservingTypes()
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